The new BlackBerry smartphone is here, and it’s a fine piece of work — light, sleek, and thin, and featuring the classic pushbutton keyboard. It’s exactly the phone I needed two or three years ago. But today? Not so much.

BlackBerry, of course, was once a leading smartphone brand, famed for its robust corporate-grade software, and its excellent physical keyboard, the best ever fitted to a pocket-sized device. But then came Apple Inc.’s iPhone.